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User’s Guide

DPG4000

Digital Test Gauge

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves

the right to alter specifications without notice.

omega.com info@omega.com

Servicing North America:

U.S.A. Omega Engineering, Inc.

Headquarters: Toll-Free: 1-800-826-6342(USA & Canada only)

Customer Service: 1-800-622-2378 (USA & Canada only)

Engineering Service: 1-800-872-9436 (USA & Canada only)

Tel: (203) 359-1660 Fax: (203) 359-7700

e-mail: [email protected]

For Other Locations Visit omega.com/worldwide

Introduction

The DPG4000 combines the high accuracy of digital electronics with

the convenience and ease of use of an analog test gauge. Accurate to

± 0.05% FS, the DPG4000 can be used as a calibration reference, or

in any application where high accuracy pressure measurement is

required.

Many user gurable functions have been designed into the

DPG4000 including sampling rate, TARE, damping, auto shut , and

min-max. Once the gauge is co gured, settings can be locked and

password protected to prevent unauthorized changes to co guration.

1.1 Customer Service

OMEGA Engineering

Tel: (203) 359-1660

Fax: (203) 359-7811

www.omega.com

email: [email protected]

1.2 Standard Equipment

Check to see that your DPG4000 has arrived intact. Batteries are

factory installed unless you have purchased the optional 24V powered

version, in which case batteries are not supplied or installed. Save the

packing materials at least until you have that there is no

concealed damage.

1.3 Safety information

A Warning identi es conditions and actions that pose hazard(s) to the

user; a Caution identi es conditions and actions that may damage the

Calibrator or the equipment under test.

Symbols Used

The following table lists the International Electrical Symbols. Some or all

of these symbols may be used on the instrument or in this manual.

Symbol Description

Power OFF

Power ON

Earth ground

Risk of Danger. Important information. Refer to manual.

Battery

Hazardous Voltage

Conforms to ATEX requirements

Conforms to relevant European Union directives.

Wheeled bin, conforms to EC directive 2002/96/EC

Hazard Location Information

Ex Hazardous Areas

An Ex-hazardous area as used in this manual refers to an area made

hazardous by the potential presence of ammable or explosive vapors.

These areas are also referred to as hazardous locations, see NFPA 70

Article 500.

Misuse

Should the DPG4000 be exposed to overpressure or sudden physical

shock (i.e. being dropped) it should be examined for any damage that

may cause a safety concern. If in doubt please return the unit for

evaluation to OMEGA Engineering, Inc. Please refer to the Customer

Service Section for contact information.

Caution

To avoid possible damage to calibrator or to equipment under test:

• If the message changes to "OL" the range limit is exceeded and the

pressure source must immediately be removed from the DPG4000 to

prevent damage to the pressure transducer inside.

• Maximum torque allowed is 13,5 Nm = 10 ftlbs. NEVER exceed the

torque allowed.

DPG4000 Display and Controls

Operation

Power: The standard DPG4000 is supplied with 3 AA batteries

installed. If you purchased the optional 24Volt powered version,

batteries are not installed. Connect a 24V power supply to the terminal

block on the rear of the gauge, noting proper polarity.

Do not install batteries when external power will be used.

Push the power button momentarily to turn the unit on. Push it again

to turn it off.

Set-up and configuration:

Push the CONFIG button to access the user-settable functions on the

gauge. Each time the CONFIG button is pressed; the display advances

Pressure display

Engineering Units

0 - 100% bar graph

Selects an action in

configuration.

Also turns the

back-light on/off

Turns Power on/off

Enters set-up and

configuration menus

Zeros the display,

Scrolls forward through

menu displays

Recalls min and max

readings.

Scrolls backwards

through menu displays

to the next function. Once a function has been set, press ENTER to

exit the configuration menu, or CONFIG to continue with further

configuration. In order, the configuration menu and operation is as

follows:

1. Engineering Units set. The unit is shipped configured to display

PSI. By pressing the ▲and ▼(ZERO and MAX/MIN) keys you

can scroll forward and backwards through the 18 standard

engineering units plus a one custom unit/scale. When the desired

unit is displayed, press ENTER or CONFIG. Pressure will now be

displayed in the chosen engineering units.

See the Specifications section of this manual for a list of available

engineering units. See the Supervisory Mode section for details on

setting up custom units.

2. Set Auto Off. The auto-shut off can be set in 1 minute increments

from 1 to 30 minutes or “off” (continuous operation). The unit is

shipped set for 30 minutes. Use the ▲and ▼keys to set the

desired interval. The “off” setting is at the low end of the choices,

below 1 minute.

3. Display battery voltage. Actual voltage and a percent of life

bargraph indicate battery condition

4. Display actual temperature. The DPG4000 is temperature

compensated, this displays the temperature measured by the

internal sensor. The value can be set to degrees F or degrees C

using the arrow keys.

5. Set damping. Choices are “on” and “off” set with the ▲and ▼

keys. Turning damping on will smooth readings from pulsating

pressure sources.

6. Set sample rate: This determines how often pressure is sampled

and the display is updated. Choices are 0.5, 1, 3, and 10

samples/second. Note that 10/sec provides the fastest response

time.

7. Set TARE. This allows you to set a constant offset value, which is

then subtracted from the measured pressure. For example if a

TARE is set at 30 PSI, and the measured pressure is 37 PSI, the

displayed value will be 7 PSI.

A pressure of 27 PSI would be displayed as –3 PSI.

The tare value is set manually with the ▲and ▼keys, and is

based on the engineering units and resolution selected for display.

TARE value can be set to the maximum range of the gauge.

The bar graph will always display the actual pressure based on the

full range of the gauge regardless of the tare setting. This is done

for safety to insure that even with a “0” reading that pressure is

being applied to the gauge.

8. Function Lock: Access to each of the settable parameters above

can be turned “off” once set, to prevent unauthorized changes to

configuration. This is accomplished through a password protected

“supervisory mode”. Press ENTER to access the supervisory

mode, or CONFIG to return to normal operation.

Supervisory Mode

Press ENTER when “FUnC LOCK” is displayed, 0PWRD will be

displayed on the gauge. The password to enter supervisory mode is

101, set using the ▲and ▼keys. Holding a key continuously will

cause the display to advance more quickly for faster setting. The

password is factory set and cannot be changed

1. Your DPG4000 is shipped from the factory with all setting access

“unlocked” or available to be changed.

2. In supervisory mode each of the parameters can be locked or

unlocked using the ▲and ▼keys. Select LOC (lock) for those

parameters you do not want to be accessible, and UnLOC (unlock)

for those can be accessed.

3. In order, the functions that can be unlocked, locked or accessed

are:

• Zero function (enable/disable)

• Set pressure units (enable/disable)

• Auto shutdown adjustment (enable/disable)

• Damping settings (enable/disable)

• Sample rate setting (enable/disable)

• Tare setting (enable/disable)

• Custom engineering units (set scale factor)

4. Use the CONFIG key to scroll through the above choices, and the

▲and ▼keys to lock and unlock features. Press CONFIG to

continue scrolling through the parameters, pressing ENTER at any

point saves your settings and returns the gauge to normal

operation.

When a function is “locked, it cannot be accessed or changed

from its current state. To change a locked function, enter the

supervisory mode, and unlock the function. Once it is changed,

you may enter supervisory mode to lock access again.

5. Setting a custom engineering unit or scale: The last menu choice

in supervisory mode is SET FACTR. This allows you to set a

multiplier factor from 0.001 to 100, creating a custom scale. The

set factor will be multiplied by the PSI measured, the result will be

displayed.

For example: 40 PSI is the equivalent of 1000 lbs of product in a

tank. You want to display the product weight , using a 100 PSI

gauge. By setting a factor of 25, a 40 PSI pressure would display

as 1000 (40 x 25). The engineering unit displayed on the

DPG4000 will be “Cust”.

Normal Operation

Turning the backlight on and off: Press the ENTER button.

Zeroing the display: Press and hold the ZERO button.

MAX/MIN: The DPG4000 stores minimum and maximum pressure

values in memory. Pressing the MAX/MIN button once will display the

minimum pressure from memory. Pressing the MAX/MIN button again

will display the maximum pressure from memory. After about 2

seconds, the gauge returns to normal (live display) operation. To clear

the MAX/MIN memory registers, press and hold the MAX/MIN button

for 2 or more seconds until “CLr” is displayed.

The analog bar graph at the bottom of the display indicates the applied

pressure level relative to the full range of the gauge. Keep in mind that

if a TARE value has been programmed into the gauge, the displayed

pressure will not reflect the true pressure applied.

Changing the Batteries

WARNING

Explosion hazard

Batteries must only be changed in an area known

to be non-hazardous.

Grasp the face ring on the DPG4000, turn it approximately ¼ turn

counterclockwise and remove. The face of the gauge can now be

lifted to expose the battery holder. Take off the battery hold clip and

remove the batteries. Install three AA batteries noting proper polarity.

Note: Use ONLY AA size batteries and be sure to reinstall the battery

holder retaining clip. Reassemble the case making certain that the face

is properly oriented.

If you purchased the optional 24 Volt powered version, the terminals for

power input are located on the rear of the gauge. To apply power

simply connect 24 volts to the rear terminal block taking care to

observe proper polarity.

WARNING

Gauges ordered with the external power option will not come with

batteries installed. Batteries MUST NOT be installed when

operating on external power. External power option gauges are not

approved for hazardous location use.

Battery life

Battery life is about 1500 hours (60 days) of continuous use with the

backlight off. With intermittent use, batteries could last a year or more.

There is a low battery icon in the upper left of the display. It will appear

when battery level is low. Replace batteries per recommendations

found in the specifications section of this manual.

RS-232 Interface

An RS-232 interface is standard on the DPG4000. Serial

communication can be used for configuration, calibration, and to

transfer measurement data from the gauge. For detailed specifications

on the interface and software communication, see pages 14 and 15 in

this manual.

WARNING

The RS-232 interface must not be used in hazardous areas.

CLEANING

To clean the DPG4000 use a cloth with a mild cleaning solution.

Specifications

All specifications cover the temperature range from 0°C to +50°C, unless otherwise

noted.

Available Input Ranges

See page 13 for a table of available ranges in PSI plus equivalent

ranges and resolution for all engineering units

Accuracy

Positive Pressure: ±0.05% FS

Vacuum: ±0.25% FS (500 PSI gauge ranges and below)

0.1% FS for 15/30 PSI compound/vacuum versions

For gauges with full scale ranges equal to, or less than 30 psi (2 BAR),

vacuum operation is limited to -5psi (-350 mBAR). The exceptions are

the 2 compound ranges; -15 to 15 PSI and -15 to 30 PSI.

Over Pressure Protection:

See table of Ranges and Resolutions.

Temperature Compensation

0°C to +50°C (32°F to +122°F) to rated accuracy

Note: For temperatures from –10 °C to 0 °C and 50 °C to 55 °C add

.005% F.S./°C

Standard Engineering Units

PSI, Bar, kg/cm2, inH2O (4°C, 20°C or 60°F),

ftH2O (4°C, 20°C or 60°F), cmH2O (4 °C and 20 °C), mH2O (4°C and

20°C), KPa, mBAR, inHg, mmHg, Torr

One custom unit (user programmable)

Media Compatibility

All ranges except 1 PSI and compound ranges:

Liquids and gases compatible with 316 stainless steel

1 PSI and compound ranges: clean, dry, non-corrosive gas

Environmental

Operating Temperature -10 °C to +55 °C

Storage -20 °C to +70 °C (-4 °F to +158 °F)

Humidity 10% to 95% RH Non-condensing

Pollution Degree II

Mechanical

Dimensions 4.5” (diameter) x 2.2” (depth) x 5” (height)

Pressure Connection: ¼” NPT Male

Housing: Stainless steel, meets NEMA 4/IP65

Display

5-1/2 Digits, 0.65” (16.53 mm) high

20-Segment bar graph, 0 to 100%

Power

Battery three (3), size AA alkaline batteries, optional 24 VDC power.

Battery Life 1,500 hours without backlight

2,000 hours at slow sample rate

Low Battery Indicator icon is displayed near the end of battery life

Indice

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